Mining machine



A. Y. HOY 1,857,376

MINING MACHINE Filed April '7, 1950 M g 18 7 i1 'I LZ/ /j [/J 4 1 w w" W Mu 1 1% van $02: A ud Zv'n Y H 0 y.

a amt Patented May 10, 1932 warren STATES PATENT AUSTIN YOUNG HOY, OF LONDON, ENGLAND, ASSIGNOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION fro SULLIVAN MACHINERY on MASSACHUSETTS I MINING MACI-IIN Application filed April 7, 1930, Serial No. 442,313, and in GreiatlBritain August 7, 1929;

This invention is for improvements in or relating to mining machines (more particularly to long-wall mining machines) of the type comprising a main section containing the power unit and a jibj whichis mounted on the main section for swinging movement in a horizontal plane and has an endless chain, carrying picks or cutters mounted thereon,and adapted to be traversed round the margin of the jib which is formed with a channel to receive and guide the cutter chain. In order to providechain adjustment in the above type ofmachine it is usual to mount thejib slidably upon a jib hanger 16 which is pivoted to the main section, the relative adjustment of jib and hanger beingcontrolled by a screw. It has previously been proposed to make the jib of built-up box-section, comprising 20 in the main, two longitudinal beams spaced apart horizontally and joined top and bottom by plates, the chain channel being'formed by four gibs or narrow plates riveted above and below the longitudinal beams aforesaid and projecting beyond their outer edges. The

wearing er faces of the longitudinal beams have'been made renewable by means of thin metal lining plates, the channelitself being T shaped with the cross bar of the T inwards and lying vertically. Suchconstructions have the advantage that all wearingsurfaces are renewable, but they are undoubtedly expensive to construct and one object to provide a jib of more robust construction and less expensive to manufacture than heretofore. Another object is to provide a jib of such a construction that the cutterchain channel may be easily machined and that wear at the bearing surfaces may readily be taken up when required.

This invention accordingly provides in or I for a mining machine of the type described a jib which is constructed in two longitudinal sections riveted or otherwise joined together withthe joint face lying in a horizontal plane through the cutter-chain channel.v Preferably, the two-longitudinal sectionsof the jib are substantiallyidentical, the joint face1befaces of thechain channel, that is; to say, the inner faces of the gibs and the outof this invention is- Of a swmging movement each section of the jib is sufficiently robust not to give rise to excessive warpingduring OFFICE E coolingafter casting, this point is of particular importance in casting steel, of terial the jib is preferably made.

According to a vention shims arelocated ,between thejoint faces of the two jib. sections,.so that Wearat which mafurther feature of the in? the'bearingsurfaces ofthe cutter-chain channel maybe easily taken upby separating the sections and removing shims.v i One construction according tothis invention will now be described in detail by wayof examplewith reference to the accompanying drawings,in which igure 1 is a ing tothis inventiommoimtedupon a hanger. Figure 2 isa sectionuponan enlarged scale taken ;on theline 22 in Figure 1,

Figure 3is a section upon an nlarged sca-le taken on :the-line- 3,3 in Figure 1,

F igurest and 5fare sections also upon an enlarged scale 'on thelines and 5-5. respectively in Figure 1, and i Figure '6 is a plan view on a reduced scale complete mining machine of the typeto which a plicable.

Throughout this descri numerals indicate like parts.

The jib, which is indicated generally by the numeral 10 in tion lland abottom section 12, which-see tions are interchangeable and are madeof tion like reference plan viewof the jib accordjib according to this invention is ap;

Figure 6, comprises a top sec-;

cast steel. These sections are riveted together as at 13, forming astiif box-section, and the jib is slidably mounted a its innerend upon a hanger 14,-: which hanger is pivoted for as indicated by the dotted line in Figure 6 upon thebody portion15 ofth'e mining machine. The cutting of coal desired thin shims,

ent invention to sprocket, and to run the cutter chain around or other material is performed by a series of cutters which are mounted upon an endless chain, indicated generally by the number 16, which travels around the periphery of the jib. The links of the chain, which are not shown, run withina T-shaped cutter-chain channel-17 one half of which is formed in each portion 11 and 12 of the jib.

The construction of the ,jib in two halves permits the wearing surfaces of the T-"shaped channel, and particularly the cross bar 18 of the T which is engaged by projections upon the links of the cutter-chain, to be machined with comparative ease,'and without any expensive machine-tool layout. Local contact faces between the two sections of the jib are provided at suitable intervals, the rivets 13 passing through these contacting faces.

which are indicated at 19, may be placed between the contacting faces to provide for adjustment of the width of the T-shaped channel 17 when wear takes place. Alternatively the shims may be om1tted an adjustment provided by machining or scraping down the contacting faces. It will be observed that thejoint face between the two sections of the jib is centralwithin the cutter-chain channel.

In order to take up slack in the cutter chain the .jib is slidably mounted upon the hanger 14 and the adjustment the following manner Clamped between the two halves 11 and 12 of the jib are two bearing blocks 20 and 21 each provided with a semi-circular channel, the two blocks embracing the shank of an adjusting screw 22. Axial movement of this adjusting screw with respectto the ib is preis effected in vented by a collar 23 and the head 24 of the screw. The. head is piercedwith two holes at right angles to each otherto take a tommy bar and lies within an aperture 25 pierced completely through. both sections of the jib. The end of the screw 22 is I gages a screwed member 26 which is rig dly fixed, for example byimeans of pins, withln a cylindrical bore in the hanger. I

In some known construction of jibs .it has hitherto been proposed to runthe cutter chain .over an idler sprocket at the free end of the jib In order to provide a cheaper construction it is preferred in a jib according tothe presdispense with this idler a semi-circular bearing machined in the free end of the jib. In such a construction it is necessary to make the cross bar 18 of the T-shaped channel 17 deeper around and in the neighbourhood of this semi-circular bearingthan along the straight sides of the jib.

l This is done in order to. accommodate the the links of throw of those projections upon the cutter chain which engage 1n the cross 1 1 I 2. In a mining machine threaded and en spirit or the scope of the appended claims.

I claim: a

1. In a mining machine of the type described, a jib which is slidably mounted upon a support for adjusting the cutter chain, having a cutter-chain channel around its periphery and comprising two longitudinal sections with the joint face between them lying in a horizontal plane through the cutter chain channel, and removable shims interposed botweenthe. two sections, said sections each having a :guideway adapted for slidable attachment to the support. 7

p of the type described, a jib which is slidably mounted upon a support for adjusting the cutter chain, comprising two identical longitudinal sectionsa'with the division between them substantially horizontal, a cutter chain channel extending along two opposed sides and in arcuate form around one end of the jib, the bearing surfaces'of which channel are formed in the two sections of thejib, and removable shims interposed betweenthe two sections at. the division, said sections each having a guideway adapted for slidable attachment to the support.

municating arcuate end grooves, said grooves when said members are united forming a cutter chain guiding channel extending along the sides and completely around the tip end of said bar and said members each having a-guideway adapted for slidable attachment to the support. j

' 4. A mining machine cutter bar which is slidably mounted upon a hanger support for adjusting the cutter chain, com-prising afpair of symmetrical members disposed in face to face relationship to form the main body of the bar, said members having elongated parallel grooves at their opposite sides and communicating arcuate end grooves, said grooves when said membersare united forming a cutter chain guiding channelextending along the sides and completely around the tip end of said bar, and each'symmetrical member having a guide for reception in guideways onthe hanger support. a j

5. A mining machine cutter bar which is slidably mounted upon a support for adjustcommunicating arcuate ing the cutter chain, comprising a pair of symmetrical members forming the main body of the bar, said members having elongated parallel grooves at their opposite sides'and end grooves, said grooves when said members are united forming a cutter chain guiding channel extending along the sides and completely around the tip end of said bar, said symmetrical members having joint faces lying in a between the outside plane surfaces of said members and said members each having a guideway adapted for slidable attachment to the support.

A mining machine cutter bar which is slidably mounted upon a support for adjusting the cutter chain, comprising a pair of symmetrical members disposed in a face to face relationship to form the main body of the bar, said members having elongated parallel grooves at their opposite sides and communicating arcuate end grooves,.said grooves when said members are united forming a cutter chain guiding channel extending along the sides and completely around the tip end of said bar, and means for effecting adjust ment of said symmetrical members relative to each other to vary the width of said outter chain guiding channel and said members each having a guideway adapted for slidable attachment to the support.

7. A mining machine cutter bar which is' slidably mounted upon a support for adjusting the cutter chain, symmetrical members disposed in a face to face relationship to form the main body of the bar, said members having elongated parallel grooves at their opposite sides and communicating arcuate end grooves, said grooves when said members are united forming a cutter chain guiding channel extending along the sides and completely around the tip end of said bar, said symmetrical members having contacting faces, and removable means between said faces for effecting adjustment of said members relative to each other to vary the width of said cutter chain guiding channel and said members each having a guideway adapted for slidable attachment to the support.

8. A mining machine cutter bar comprising a pair of symmetrical members disposed in face to face relationship to form the main body of the bar, said members each having a portion to cooperate with a hanger support, a hanger support, and means for effecting adjustment of said members relative to said hanger support.

mining machine cutter bar comprising a pair of symmetrical members disposed in face to face relationship to form themain body of the bar, said members having elongated parallel grooves at their opposite sides and communicating arcuateend grooves, said grooves when sa1d members are united formplane midway comprising a pair of inga cutter chain guiding channel extending along'the sidesand completely around the tip end of said bar, said symmetrical members having a portion. disposed at theend remote from said tip end ofthe bar to cooperate with a hanger support, a hanger support, and means betweensaid members and said hanger support for effecting adjustment of said members relative thereto.

10. A mining machine cutter bar which-is slidably mounted upon a support for adjusting the cutter chain, comprising two major sections forming the main body of the bar and having elongated parallel sides and a curved end, said sections having plane surfaces formingthe top and bottom surfaces of the bar and joined together in a plane parallel to said surfaces and midway therebetween, said sections each havinga groove extending along its sides and completely around the curved end, saidgrooves when said sections are united forming a cutter chain guiding channel and said sections each having a guideway adapted for slidable attachment to the support; a v

11. A mining machine cutter bar comprising two major sections forming the main body of the bar and having elongated paral-V lel sides and a curved end and communicating openings, said sections having plane surfaces forming the top and bottom surfaces of the bar and havingfaces contacting in a plane parallelto and midway between said surfaces, a hanger support, and means for of fecting movement of said sections longitudi; nally relative to said hanger support comprising manually operable means including an element receivable in the openings in said sections. p

12. A mining machine cutter bar comprising two major sections forming the-main body of the bar and having elongated parallel sides and a curved end and communicating openings, said sections having plane surfaces forming the top and bottom surfaces of the bar and having faces contacting in a plane parallel to and midway between said surfaces, said sections having elongated parallel grooves} at their opposite sidesandcommunia cat-ing arcuate end grooves, said grooves when said sections are united forming a cutter chain guiding'channel extending along the sides and'completely around the tip end of said bar, a hanger support, and means for effecting movement of said sections longitudinally relative to said hanger support comprising manually operable means including an element receivable in the openings in said sections. 7 l r 13. A cutter bar which is slidably mounted upon a hanger for adjusting the cutter chain. characterized in that the slidable cutter bar consists of two identical cast steel sections which are j oined together in the central horizontal plane through the cutter chain.

14.. A cutter ha]: constructed in accord ance with claim 13 wherein means including an adjusting screw is providedfor adjusting the bar relative to the hanger and the two sections form the bearing for the head of the adjusting screw.

- 15. Acutter bar constructed in accordance with claim 13 wherein the wear at the bearing surfaces of the cutter chain is taken up by 1 exchanging interpositions between the sections. 1 In testimony whereof I affix my si nature.

AUSTIN YOUNG iioY. 

